Cabinet type unit heater



.Aug.30,1932. L. P. DWYER 1 81 4 CABINET TYPE UNIT HEATER Filed March16. 1931 4 Sheets-Sheet l JQI/ifP/ZLP 2 22/ 27' Inn'enH? 1 L. P. DWYERCKBINET TYPE UNIT HEATER Aug. 30, 1932.

Fild March 16, 1951 I 4 Sheets-Sheet 2 omgyg.

Aug. 30, 1932.

L. P. DWYER -CABINET TYPE UNIT HEATER 1931' 4 Sheets-Sheet 3 Filed March16 illliil W Aug. 30, 1932. L, P, DWYER 1,874,940

CABINET TYPE UNIT HEATER Filed March 16. 1931' 4 Sheets-Sheet 4pltflltfla Aug. 30, 1932 um'rao STATES LAWRENCE P. nwnix. Oil WINNER-A,ILLINOIS, ABSIGNOB TO 0. A. DURHAM CO1! PATENT or-Flor:

. PM; IAB SHALLTOWN, IOWA, A CORPORATION OF IO WA CABINET TYPE UNITHEATER Application ma mm. 16, 1931. Serial No. 323,131.

This invention relates to certain new and useful improvements in acabinet-type unit heater, and moreparticularly to a heater of this t ewhich 1s compact, self-contained 5 and w ich is invertible or adaptedfor use in a plurality of different positions, so that it is ofsubstantiall universal a plication with-.

out any materia alterations in the structure. Modern building conditionsdemand that the heating a paratus be concentrated in the smallestpossible amount of space, and in addition beadapted to a wide variety ofinstallation ap lications. The radiators may be positions adjacent thefloor, ad'acent the ceiling, or concealed in walls or, ues. For oneexample, where radiators are located 1n basements, the practice insteam-heating or hot-water heating systems is to locate the radiatornear the ceiling above the supply and return pipes so as to simplify thep1ping. When the ordinary type of radiator is thus located, it isimpossible to satisfactorily heat the space adjacent the floor becausethe air tends to stratify into layers of varying tom ratures, the highertemperatures prevailin adjacent the ceiling. It is, therefore, esirableto provide means for positively causing the heated air to circulate downwardly.

Unit heaters of the type with which this invention is concerned comprisea self-contained radiator and a blower or other means for causing air topositively move through the unit in contact with the heating surface.The present invention relates to such a unit which is capable of use ina variety of positions, either upright, inverted or partially inverted,

and one which may be alternately used either used in con-.

adjacent the floor or ceilingnor cealed radiating systems. e presentunit heater is also designed to operate satisfactorily when the bloweris not in operation,

that is, the heatin element will cause the desired aspirating e ect onthe air so as to cause circulation through the heater.

Briefly described, the im roved heater comprisesasubstantiallycloserectangularcasin having rmanently connected rear, end and top wal thetop wall bein provided with 9.1 grille or openings for the 'scharge ofthe heated air. The bottom of the casing is open, and the removablefront wall is provided with openings or a grille in its lower portion,

so that air may be alternatively drawn into the casing through the openbottom thereof or through the grille in the lower portion of the frontwall. The casiiig'is divided by an intermediate horizontal partitioninto upper and lower compartments, the radiating unit being mounted inthe upper'compartment so that all air passing through the casing mustflow between the tubes of the radiators so as to be heated thereby. Theblower apparatus is suspended from the partition within the lowercompartment so as to positively cause the circulation of air through theheater. The air flow will always be in the same direction through theheater, but the heater may be bodily inverted or partially invertedwithout aifecting the satisfactory operation thereof.

The principal object of this invention is to rovide an improved unitheater of the type riefly described hereinaboveand disclosed inore indetail in the specifications which fol- Another obiect is to provide aunit heater of substantial y universal application, that is, one thatmaybe installed in a plurality of difierent locations or positions.

Another object is to provide a compact unit heater which will develop amaximum efficiency for a minimum size.

, Another object is to provide an improved" unit heater capable ofpositively circulating air downwardly through a compartment to beheated.

Another object is to provide a unit heater in which the noise of theoperating parts will be reduced to a minimum.

Another object is to provide a radiatorfor the unit heater which hasalternative connections, .whereby it may be inverted or installed in alurality of different positions.

Another 0 ject is to provide a radiator which has a long life, is notsubject to destructive corrosion, and which is less susceptible tofreezingthan radiators of this type in ordinary use.

Another object is to provide aunit heater in which the individualradiator tubes may be easily removed, replaced, or put out of servicewithout afiecting the operationf of the remaining parts.

Another object isto provide an im roved blower or fan construction for aunit eater. Another object is to provide unimproved and simplified fanhousing for a unit heater. Another object is. to provide im roved meansfor sealing the air passages t rough the heater so as to causesubstantially all of the air flow to be in contact withirthe radiating,surfaces. K

Another object is to provide a unit heater capable of satisfactoryoperation .whenxthe air circulates by gravity, that is when the blowermechanism is not in o erati on.

Another object is to provi e an improved unit heater provided with avalve mechanism whereby the percentage of air-flow in contact with theradiating surfaces may be varied as desired- Another object is toprovide a unit heater which may be assembled and shipped as a unit.-

Qther objects and advantages of this invention will be more apparentfrom the following detailed description of one approved form of theapparatus constructed in accordance with the principles of thisinvention.

In the accompanying drawings: Fig. 1 is a perspective view of theimproved unit heater as installed in its normal upright position.

Fig. 2 is a similar view of the heater installed in inverted positionadjacent the ceiling of a room or compartment.

Fig. 3 is a similar view of the heater installed in partially invertedor sidewise position in one upper corner of a room.

Fi 4 is a sectional perspective view show- A ing t e heater installed ina wall or flue.

Fig. 5 is a vertical longitudinal sectional view through the heater, theview being taken looking from the rear toward the removable front wall.

Fig. 6 is atransverse vertical section, taken substantially on the line6-6 of Fig. 5.

Fig. 7 is a partial verticahsection' corresponding to the upper righthand portion of Fig. 6, but showing a modification.

Fig. Sis a horizontal section taken substan-' tiallyon the line 8-8 ofFig. 5. a

Fig. 9 is a partial vertical section taken substantially on the line 99of Fig. 8.

Fig. 10 is a perspective view of one of the brackets used for supportingthe radiator.

Fig. 11 is a perspective view of one of the radiator headers. 1

Fig. 12 is a detail perspective view showing one of the cushionedsupporting members for the intermediate partition of fan panel.

Fig. 13 is a longitudinal section through the end portion of one of theradiator tubes.

the heating unit, as shown in ig. 1. It will be understood that when theunit is inverted, or partially inverted, as shown in Figs. 2 and 3, someof the terms used will no lon at be strictly applicable, since-what isdescri d as the top wall may become the bottom wall or a side wall. Itis to be understood, therefore, that the terms hereinafter used aremerely relative and do not necessarily identify the actual positioningof the parts described when in service.

The heater casing is built up of sheet metal plates or panels comprisinga rear wall 1, end walls 2, and a top wal 3, permanently united byhaving overlapping portions secured together by spot welding or in anyother suitable manner. The rear wall 1 and end walls 2are substantiallimperforate, but the top wall 3 is provide with a plurality ofopenings4so as to form a grille through which the heated air isdischarged. The lower side 7 ,or bottom of the casing is opened, asindicated at 5, (Fig. 6) but a metallic angle member 6 extends aroundthe four sides of this open bottom, the front portion 7 of this anglemember remaining permanently in place, even when the removable frontWall or panel has been removed. A second angle her 8 is secured to theinner side of the front angle bar 7 so as to provide an inwardlyprojecting horizontal flange 9, as best shown in Fig. 6. The

front edge portions of the end walls 2 and and top edges, adapted toabut against the flanges 12 when the front wall is in position.

Along its lower edge the front wall 13 is flanged inwardly at 15 andthen downwardly at 16 to hook over the horizontal flange 9 of now beapparent that in order to remove the front panel 13 it is merelynecessary to 'unscrew the bolts 17 and then lift the front wall upwardlyand outwardly so as to disengage thehooked lower edge 16 from the flange9.

The lower portion of the front wall 13 is provided with a plurality pfholes or openings the angle bar' 8, thus holding the lower portion ofthe front wall in place. Screw bolts (v 46 detail.

20 so as toform a grille through which air may be drawn into the casing.It is to be understood that the air to be heated may be drawn into thecasing either through the 5 grille 20 or through the open bottom 5, andthe heated air will always be expelled through the grille 4 in the topwall 3. -*The direction of air flow is indicated by the arrows in Figs.

1, 2, 3 and 4. When the heater is mounted in normal upright position, asindicated in Fig. 1, the'bottom opening 5 will 'be' closed by the floor,indicated at 21.- In a similar manner when the heater is inverted,.asshown in Fig.

2, the open side will be closed by ,the ceiling 22,.and when positioned,as shown in Fig. 3, the open side is closed by the side wall 23 of thebuilding. In all of these installations, the air to be heated is drawnin through the grille in the front wall 13. Ordinarily when the 2.heater is mounted in a flue or wall passage (see Fig. 4) the air will bedrawn in through the open bottom 5, and usually the'installation will besuch that the grille 2O inthe front wall will be closed by an adjacentwall 5 of the flue or passage. If this is not the case,

a substitute front: panel 24 may be used, which is exactly similar tothe front wall 13 except that the grille openings 20 are omitted. Or,alternatively, the openings 20 may 3 be closed by any suitable covermember, or it may be'immaterial whether the openings are closed or not.

The casing is interiorly divided, above the grille 20 in the front wall13, by an in-.

terior partition 25 which divides the casing into upper and lowercompartments. This partition is referred to as a fan-panel since itsupports'the blower mechanism, all of which will be describedhereinafter in more The upper compartment above the partition 25, issubstantially closed except for the outlet grille 4 in the top wall 3.The radiator, indicated as an entirety at 26, is mounted in this uppercompartment. The radiator comprises a pair of similar headers 27, one ofwhich is shown in perspective in Fig. 11. One of these headers issupported adjacent each end wall 2 of the casing, the header being inthe form of a hollow casting formed with a pair of downwardly project-ving supporting legs 28. A sheet metal supporting bracket (shown in Fig.10) comprises a vertical supporting wall 29 which is spotwelded orotherwise se cured to the end casing wall 2, a horizontal bracket wall30, and upwardly projecting lugs 31 to which the legs 28 of the headerare attached by means of the screw bolts indicated at 32. Thebracket maybe provided with a'reinforcing web 33, Welded orotherwisesecuredthereto.

Each header 27 is formed on its inner face with a plurality of similarspaced-apart openings 34, each comprising a larger interiorly threadedportion 35 adapted to receive an an- 65 nular clamping nut 36, and asmaller inner portion 37, through which the end portion of one of theradiating tubes 38 is adapted to project. These tubes 38 are formed ofcomparatively thin metal preferably seamless drawn copper, and eacprovided with a spi- 4 rally Wound continuous copper fin 39 on itsouter'surface to increase the radiating surface. The headeropenings 34for receiving the tubes are so arranged that the tubes38 will bepositioned in staggered relation, as

best shown in Fig. 6, so as to provide devious air passagestherebetween, and preferably the tubes will slant slightly downwardtoward one end, as shown in Fig. 5, so as, to facilitate drainage.formed on its inner end with an annular wedge portion 36, which isadapted to be forced between the outer surfacevof tube 38 and the camsurface of the header formed about the reduced opening 37 so as to sealthe opening and clamp the radiating tube tightly in position. Areinforcing thimble 40 is inserted in the end portion of tube. 38 toprevent crushing the tube when the Sealing nut 36 is screwed intoposition. Preferably the thimbles 40 at the steam inlet ends of thetubes will each be formed with a pair of inturned restricting'fingers 41(see Fig. 14) so as to impede somewhat the flow of steam or otherheatingmedium through the 5 tubes, and secure more equal distribution ofsteam into the several tubes.

Each header is formed in its outer surface v with a plurality of spacedinlet or discharge openings 42, which are interiorly threaded 00 toreceive the end of a supply pipe 43 ,or a discharge pipe 44. Theopenings 42 which are not used for connection with the supply anddischarge pipes will be closed by plugs 45. As shown in Fi 11, twoofthese openings 42 will be positioned at the upper and lower cornersalong one side of the header,

1 and the third opening will be positioned intermediately along theopposite side of the header. It will beapparent that since the twoheaders are duplicates, but one is re.-

versed with relation to the other, the openings in one header will bepositioned out of line with the openings in the opposite header, so asto tend to create a more uniform 5 dispersion of the heating mediumthrough the several radiating, tubes 38. The restricting devices41 inthe ends of the tubes also serve to create a more uniform distribution,

of the heating medium.- When steam is used as the heating medium, theinlet pipe 43 may be provided with a control valve 46, and the outletpipe 44 provided with a steam trap 47 in the usual manner, and asillustrated in Figs. 1 to 4 inclusive;

In order to insure proper flow of the heating medium and properdrainage, the inlet pipe 43 should be connected with that opening 42which happens to be positioned upper- .most in one of the headers, andthe discharge The brass clamping nut 36 ,is so most opening 42 in theother header; It will be'a. parent that the openings used will dependupon the position in which the unit heater 1S- installed, as in theexample shown in. Figs.- 1. to 14 inclusive. When the unit heater isfirst assembled and shipped, closure plugs '45 may be provided in all ofthe openings 42. When the f 'osition in which the heater is to'beinstalle has been determined,

holes must be provided in the end plates2' to receive the supply anddischarge PIPES.

Such holes may be'cut for this purpose, or

- partially severed cut-out plu 's may be formed in the end wallopposite each bpening 42, as indicated at 48 in Fi s. 1 to 4. The

' proper holes will be punc ed out and the plugs 45 removed from theexposed openings 42, the other plugs 45 remainin in place to 1 close theopenings filled there y. It will therefore be apparent that thisradiator is adapted for use in practically any position in which theheating unit may be installed.

-The header passages, and thepass es in the radiating tubes 38 willpreferab y be made somewhat larger in cross-section than has hithertobeen the practice, so that water will not be held therein, due-tocapillarity, thereby precluding the liability of water freezing in thepipes, and insuring proper drainage. It will be apparent that when thefront wall or panel 13 has been removed from the casing all of theradiator tubes 38 are .accessible so that any individual tube mayremoved by unscrewing the nuts 36. In this way, a damaged or leaky tubemay be removed and replaced without .dis

turbing the remaining tubes, and if desired plugs maybe screwed into theopenings 35 to close these openings and permit the radi ator to operatewith the remaining tubes after one tube has been removed.

In' order to insure the flow of air through the casing in contact withthe radiating surfaces of the heating tubes, stop walls or baffleplates, 49 and 50 are secured to the inner surfaces of the rear andfront walls 1 and 2 opposite the radiator 26. It will be apparent thatthese baflie walls will prevent the fiow of'air upwardly along the frontand rear walls and will 'force all of the air to flow up through thetortuous passages between the radiating tubes. In a similar man ner, thesupporting brackets 30 tend to prevent the flow ofair upwardly beyondthe ends of the headers 27. It will'be noted that the bafiie wall 50 isremoved with the front wall 13 so as to permit free access to theradiator when this wall is removed.

In the modification shown in Fig. 7, the upper and lower walls of thestop member 50 are provided with a plurality of openings 51 and 52,respectively, and a valve 53 is provided to control the flow of airthrough-the passage 54 between bafile wall 50 and front wall 13. In thismanner a'measured flow of air may be shunted through this passage 54 soas to modif the heating efi'ect of the radiator. The val outside thecasing in any desired manner.

The partition or fan-panel 25, hereinabove ve 53 may be adjusted from Hreferred to, is formed of a single metal plate provided, at each side ofits central portion with a rectangular opening or air passa (see Fig.8). The motor 56 is mounte betweenfthe arms of a U-sha edbracket 57 ,seacured to the under-side o partition 25 between the openings 55 by meansof bolts 58.- Non-metallic' bushings will preferably be provided in thesupporting brackets 59 for the motor trunnions so as to deaden the soundof the motor operations. On each-of the projecting ends60 of the motorshaft is secured curved so that its edges fit in abutting relation withthe edges of the two similar scroll 64 and 67 being spot welded togetherto commembers64, the edges of these plate members plete the housing.Each end wall 64 is provided with a central air intake opening 68. .Itwill be apparent that these fan-housings are of very simple and lightconstruction, and are supported directly from the partition 25 butentirely independently of the motor a d fans. When the motor 56 isrunning and t fans 62 are in operation, air will be drawn into the fanhousing through the end openioc ings 68 and projected upwardly throughthe I partition openings 55 intothe upper casing chamber, the air thenflowing upwardly between the radiator tubes and being heated thereby,and then passing out through the grill 4 'inthe top wall of the casing.If desired, directing vanes may be placed on partition 25 across theopenings 55 to guide and distribute the air projected toward theradiator. This direction of air flow through the unit heater will be thesame, no matter in which alternative position the heater may be mounted,as in the examples shown in Figs. 1, 2, 3 and 4.

This intermediate partition or fan panel 25 and the blower assemblysupported thereby are yieldably carried by the end walls 2 of the unitheater housing. Metallic angle brackets 69 are spot welded or otherwisesecured to the end walls 2, andbolts 70 are passed through matingopenings in the horiioni'ng elements, are ositionedaround the bolt ateach side 0 the partitlon 25, that is, one thimble is positioned betweenthe bracket flange 71 and the partition, and a similar thimblepositioned between the thimble and the locking nut and washer-7 3 on theend of bolt 70. In this manner the vibratory movements of the motor andfan mechanism will be cushioned and not transmitted tothe supportinghousing, thus materially deadening the sounds created by the movingdparts.

Suitable sealing strips are provide around the ed es of partition 25 toprevent the passage 0 air between the edges of the part1- tion and thecasing walls without provlding rigid metallic contacts at these ed es.For this purpose, felt strips 74 have their ree outer edge portionsengaged against the walls of the heater casing (see Fig. fl) and their1nner portions are encased in folded metalllc binding members 75 soas-to stifi'en the inner portions of the strips and permit them to besecured to the partition 25 by a limited number of rivets or. similarsecuring means 76. The similar sealing strips used at the respectiveends of the partition may be held in place by the supporting bolts 70,as clearly shown in Figs. 5 and 12. It will now be apparent that all ofthe moving parts are carried by the partition or panel 25 and that thispanelis completely cushioned with respect to the unitheater housing fromwhich it is supported, so that the vibrations of the moving parts willnot be transmitted to the heater housing and the noises will bematerially deadened.

This improved unit-heater is not only one that may be used in variouspositions and locations. so as to circulate the heated air eitherupwardly, downwardly or laterally, but when mounted in normal uprightposition the construction issuch that air will circulate satisfactorilythrough the casing by convection.-

Tn ordinary types of unit-heaters, as heretofore known, the heat outputhas been varied entirely by stopping and starting the fan or blower.However, if circulation of the air in the room ceases, with thecessation of. operation of the fan. sensations of chill will be ex jperienced by the occupants of the room and the heating system is, forthis reason, unsatisfactory. Since the air will continue to circulatethrough this unit-heater. to a modified extent, even after the blowerhas ceased to operate. such sudden temperature variations areavoided. i

It will be noted that this unit-heater is entirelv self-contained andmay be assembled at the factory, and no material changes are necessaryfor adapting the heater to a wide variety of different installations.Theiconstruction is'compact and comparatively light, the operation issubstantially noiseless, and all of the operating parts are easilyaccessible for repair or replacement.

It is to .be understood that in the claims which follow the designationof certain portions of the apparatus as bottom and to front and rear,upper and lower, etc., mere y refer to the locations of these parts whenthe unitheater is in normal upright position. These terms are merelyrelative and it is to be understood should be reversed or interchangedwhen the heater is inverted or partially inverted.

I claim: 01. -A unit heater comprising a casing open at the top andbottom and having closed side and rear walls and a front wall withopenings in the lower portion thereof, a radiator ositioned between theclosedupper walls 0 the casing, and means positioned in the lowerportion of the casing beneath the radiator forv causing a circulation ofair through the casin and radiator, the air being drawn in through thebottom or open portion of the front wall and expelled through the openupper end of the casing, the unit being operable in inverted or.partially inverted positions the direction of air flow through-thecasing remaining the same. i 2. A unit heater comprising a casing havingopenings adjacent the top and bottom thereof, and closed end and rearwalls and a removable front wall, a radiator comprisin headers supportedadjacent the end walls an a plurality of radiating tubes extendingbetween the headers in spaced apart, relation to permit the circulationof air through the casing between the tubes, the respective ends of eachtube being removably and separately connected in communication withopenings in the. opposed headers, whereby any tube may be individuallyremoved when the front wall is removed from the casin p 3. A unit heatercomprising a casing having openings adjacent the top andbottom thereof,and closed end and rear walls and a removable front wall, a radiatorcomprising headers supported adjacent the end walls and a plurality ofradiating tubes extending between the headers in spaced apart relationto permit the circulation ofairthrough the easing between the tubes, theheaders being formed with a plurality of openings to receive thetubeends, a portion of each opening being threaded to alternativelyreceive an annular locking nut for sealing the tube in position or aplug for closing the opening when the tube is removed. 1 1 v 4. A unitheater comprising a casing having openings adjacent the top and bottomthereof, and closed end and rear walls and a removable front wall, aradiator comprising headers supported adjacent the end walls and aplurality of radiating tubes extending between the headers in spacedapart relation to permit the circulation of air through the casingbetween the tubes, means for removably securing each tube end incommuni--v openings in the front wall and ividing the restrictin I meansmounted in; the open end portion 0 the tube to offer resistance to theow of heating medium from one header .to theother through the tube.

casing into upper and lower compartments, the partition avin openingstherein, blower means supporte by the partition within the lowercompartment and adapted to draw in air through the 0 en bottom or theopenings in the front wa l and discharge the air into the uppercompartment, a radiatormounted within the upper compartment betweenthefront, rear and side walls so that the air must pass through theradiator before being discharged through the openings in the top of thecasing and alternative means for connecting supply and discharge pi sfor heating medium to the radiator, so tliZt the unit may be used in anyupright, inverted or partially inverted position.

6. A unit heater comprising a casing having openings adjacent the topand bottom thereof and closed end and frontand rear walls, a radiatormounted within the casing and comprising a pair of headers positione adjacent the end walls and a plurality of radiating tubes communicatingwith and extendq between the headers in spaced apart relation,

suppl' and discharge pipes for the heating medi m adapted to beconnected with the respective headers, each header being provided in theside thereof adjacent the casing end with aplurality of alternativeopenings for receiving a supply or discharge pipe, andplugs for closingall but one ofthese openin s. I

g. A unit heatercomprising a casing having openings adjacent the top andbottom thereof and closed end and front and rear walls, a horizontalpartition mounted within the casing and dividing same into upper andlower compartments, a radiator positioned in the upper compartment, thepartition having openings therein, a blower means suspends from thepartition in the lower compartment and adapted to force 'air upwardlythrough the openings, and means for yieldlngly supporting the partitionfrom the end walls of the casing.

8. A unit heater comprising a casing having openings adjacent the topand bottom thereof and closed end and front and rear walls, a horizontalpartition mounted within the casing and dividing same into upper andlower compartments, a radiator positioned in theupper compartment, thepartition having openings therein, a blower as'raeeo means suspendedfrom the partition in the lower compartment and adapted to force air theopemngs, brackets on in the casing and dividing same into upper andlower compartments, a radiator positioned in the upper compartment, thepar-,

tition having 0 enings therein, a blower means suspends from thepartition in the lower compartment and ada ted to force airupwardlythrough the openings, brackets on the end walls of the casmg,bolts extending throu h the end portions of the artition and t ebrackets, and rubber thim les surrounding the bolts at each side of thepartition.

10. A unit heater comprising a casing having openings adjacent the -toand bottom thereof and closed end and opt and rear walls, a horizontalartition mounted within the casing and divi ing same into upper andlower compartments, a radiator positioned in the upper compartment, thepartition having openings therein a blower means suspended from thepartition in the lower com partment and adapted to force air upwardlythrough the openings, means for yielding'ly supporting the artition fromthe walls of the casing, and exible sealing strips secured to theseveral edge portions of the partition and en agin the walls of thecasing.

11. unit eater comprising a casing having openin adjacent the top andbottom thereof an closed end and front and rear walls, a horizontal pthe casing and divi ing same into upper and lower compartments, aradiator positioned in the upper compartment'gthe partition havingopenings therein, a lower means sue Oil artition mounted within pendedfrom the partition in the lower compartment and adapted to force airupwardly through the openings, means for yieldingly supportingthepartition from-the walls of the casing and flexible sealin meanscomrising elt strips and metal inders reinorcing the inner edge portionsof the strips, the reinforced inner portions of the aim being secured tothe edge portions of t e partition, and the free outer edges of the feltstrips engaging-the inner walls of the casing.

12. A unit heater comprising a casing having openings adjacent the topand bottom thereof and closed end and front and rear walls, a horizontalartition mounted within the casing and divi 'ng same into upper andlower compartments, a radiator positioned as i in the upper compartment,the partition having ofpenings therein, a blower means suspended rom t epartition in the lower compartment and adapted to force air upwardlythrough the openlngs, brackets on the end walls of the casing, boltsextending through the end portions of the partition and t e brackets,rubber thimbles surrounding thebolts at each side of the partition, andflexible sealin means comprising felt strips andmetal bin ersreinforcing the inner edge portions of the strips, the reinforced innerportions of the strips being secured to the edge portions of theartition, and the free outer ed es of the fe t strips engaging the innerwe is of the casin LA ENCE P. DWYER.

